Add BitUtils (from "Support multiple filters per association request")
This patch is a cherry-pick of the BitUtils class from commit
36e866b8.
(cherry picked from commit 36e866b8)
Test: none
Change-Id: Iaf33929f6841db273a92d650e84287bf2964fa3d
Merged-In: I0a978787551a1ee5750ec5544b241d3bbfed5a7c